Mennon S 18% Gray Card cards Double Face/Pure 2 in 1 balance exposure

Description
Feature
 Set of two flexible check cards takes guessing out of setting perfect exposure and color balance,
 that can only be archived with high quality Mennon Gray Cards with the uniform spectral reflectance,
 regardless of wavelength, color or intensity of the illumination. Each card has two sides:
 one side white and other is gray. The gray side used as a reference area for exposure metering
 while the white side enables correct white balance that is so important in digital photography.
 Product Description
 Condition:Brand New
 Color: Grey

Professional 18% gray cards, 2-IN-1 set of two double-sided cards: one side white and the other gray. Use it to produce proper, consistent image exposure and white balance.

Features
Card sizes: 8"x6" and 6"x4"
Gray side: Reflectance 17.8%; Density 0.74
White side: Reflectance 92.0%; Density 0.036
Core material:High density paper based composite
Gray side material: special paper with spectrally flat 18% coat
Max. deviation of reflectance: 2%
Max. error in exposure measurements: 1/8 of F-stop

Package
1x Double-sided Gray Card 6"x8"
1x Double-sided Gray Card 4"x6"
1x Instruction Disc